[PIR] Support some while_loop op_test

python/paddle/static/nn/control_flow.py

@@ -675,25 +675,34 @@ def while_loop(cond, body, loop_vars, is_test=False, name=None):
 
     pre_cond = cond(*loop_vars)
 
+    check_variable_and_dtype(
+        pre_cond, 'var of cond returned', ['bool'], 'static.nn.while_loop'
+    )
+    if reduce(lambda a, b: a * b, pre_cond.shape, 1) != 1:
+        raise TypeError(
+            "the shape of the variable returned by cond should be [1],"
+            f"but given shape as {list(pre_cond.shape)}."
+        )
+
     if in_pir_mode():
         while_op = build_while_op(pre_cond, flatten(loop_vars))
         with while_op.body() as cur_block:
             args = cur_block.args()
             next_var = body(*args)
+            try:
+                assert_same_structure(
+                    flatten(next_var), flatten(loop_vars), check_types=False
+                )
+            except ValueError as e:
+                raise ValueError(
+                    "body in while_loop should return the same arity "
+                    f"(length and structure) as loop_vars: {e}"
+                )
             next_cond = cond(*next_var)
             next_cond.stop_gradient = True
             cf_yield([next_cond, *next_var])
         return while_op.as_operation().results()
 
-    check_variable_and_dtype(
-        pre_cond, 'var of cond returned', ['bool'], 'static.nn.while_loop'
-    )
-    if reduce(lambda a, b: a * b, pre_cond.shape, 1) != 1:
-        raise TypeError(
-            "the shape of the variable returned by cond should be [1],"
-            f"but given shape as {list(pre_cond.shape)}."
-        )
-
     if in_dygraph_mode():
         now_cond = pre_cond.item()
         while now_cond:

test/legacy_test/test_while_loop_op.py

@@ -523,7 +523,8 @@ def fn_add_one():
 
 class TestApiWhileLoop_Error(unittest.TestCase):
     @compare_legacy_with_pt
-    def test_error(self):
+    @test_with_pir_api
+    def test_error1(self):
         def cond_returns_constant(i):
             return 1
 
@@ -549,27 +550,9 @@ def body_returns_error_length(i):
         def body_returns_error_type(i, ten):
             return paddle.increment(i)
 
-        def cond_returns_with_mutable_dict(i, test_dict):
-            return i > 0
-
-        def body_returns_with_mutable_dict(i, test_dict):
-            test_dict['new_key'] = paddle.tensor.fill_constant(
-                shape=[1], dtype='int64', value=1
-            )
-            return paddle.increment(i), test_dict
-
-        def cond_returns_with_mutable_list(i, test_list):
-            return i > 0
-
-        def body_returns_with_mutable_list(i, test_list):
-            test_list.append(
-                paddle.tensor.fill_constant(shape=[1], dtype='int64', value=1)
-            )
-            return paddle.increment(i), test_list
-
         main_program = paddle.static.Program()
         startup_program = paddle.static.Program()
-        with program_guard(main_program, startup_program):
+        with paddle.static.program_guard(main_program, startup_program):
             data = paddle.tensor.fill_constant(
                 shape=[1], dtype='int64', value=1
             )
@@ -656,7 +639,35 @@ def value_error_body_returns_error_type():
 
             self.assertRaises(ValueError, value_error_body_returns_error_type)
 
+    @compare_legacy_with_pt
+    def test_error2(self):
+        def cond_returns_with_mutable_dict(i, test_dict):
+            return i > 0
+
+        def body_returns_with_mutable_dict(i, test_dict):
+            test_dict['new_key'] = paddle.tensor.fill_constant(
+                shape=[1], dtype='int64', value=1
+            )
+            return paddle.increment(i), test_dict
+
+        def cond_returns_with_mutable_list(i, test_list):
+            return i > 0
+
+        def body_returns_with_mutable_list(i, test_list):
+            test_list.append(
+                paddle.tensor.fill_constant(shape=[1], dtype='int64', value=1)
+            )
+            return paddle.increment(i), test_list
+
+        main_program = paddle.static.Program()
+        startup_program = paddle.static.Program()
+        with paddle.static.program_guard(main_program, startup_program):
+            data = paddle.tensor.fill_constant(
+                shape=[1], dtype='int64', value=1
+            )
+
             # The length of `output_vars` with mutable value should keep same with `loop_vars`
+            # TODO(zhangbo): slice error need to fix, loop_vars support list/dict
             def value_error_body_returns_with_mutable_dict():
                 test_dict = {
                     "int_constant": paddle.tensor.fill_constant(
@@ -673,6 +684,7 @@ def value_error_body_returns_with_mutable_dict():
                 ValueError, value_error_body_returns_with_mutable_dict
             )
 
+            # TODO(zhangbo): loop_vars support list/dict
             def value_error_body_returns_with_mutable_list():
                 test_list = [
                     paddle.tensor.fill_constant(
@@ -691,7 +703,8 @@ def value_error_body_returns_with_mutable_list():
 
 
 class TestApiWhileLoopSliceInBody(unittest.TestCase):
-    # @compare_legacy_with_pt
+    @compare_legacy_with_pt
+    # @test_with_pir_api (need to fix slice bug in pir)
     def test_var_slice(self):
         def cond(z, i):
             return i + 1 <= x_shape[0]